Phrenology

[Two college friends are sitting across from each other at a picnic table near an American elm. Here's part of that conversation found under the minimal shade of an otherwise sunny afternoon...]

Bob: This intro psychology course is wired to fire much unnecessary yawning. I knew I should have studied nephrology.

Fred: Intro psychology courses don't cover pseudoscience?

Bob: I believe you're thinking of phrenology.

Fred: Correct me on my word usage one more time, and your kidneys will be in danger!

Bob: Given these lexical problems, perhaps we need to visit a neurologist who specializes in grammar. To the linguistics department we go!

Fred: Never. I don't eat Italian.